"""Pydantic schemas for the AI Assistant plugin."""

from __future__ import annotations

from datetime import datetime
from typing import Any

from pydantic import BaseModel, ConfigDict, Field


# ─── Providers ───

class AIProviderCreate(BaseModel):
    name: str = Field(..., min_length=1, max_length=100)
    provider_type: str = Field(..., min_length=1, max_length=50)
    api_key: str = Field(default="", max_length=2000)
    base_url: str = Field(default="", max_length=500)
    is_active: bool = True
    is_default: bool = False
    config: dict[str, Any] = Field(default_factory=dict)


class AIProviderUpdate(BaseModel):
    name: str | None = Field(None, min_length=1, max_length=100)
    provider_type: str | None = Field(None, min_length=1, max_length=50)
    api_key: str | None = Field(None, max_length=2000)
    base_url: str | None = Field(None, max_length=500)
    is_active: bool | None = None
    is_default: bool | None = None
    config: dict[str, Any] | None = None


class AIProviderResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: str
    name: str
    provider_type: str
    api_key: str  # masked in routes
    base_url: str
    is_active: bool
    is_default: bool
    config: dict[str, Any]
    created_at: datetime | None = None
    updated_at: datetime | None = None


# ─── Models ───

class AIModelCreate(BaseModel):
    provider_id: str
    model_id: str = Field(..., min_length=1, max_length=200)
    display_name: str = Field(..., min_length=1, max_length=200)
    context_window: int = Field(default=4096, ge=1)
    supports_tools: bool = False
    supports_streaming: bool = True
    is_active: bool = True
    config: dict[str, Any] = Field(default_factory=dict)


class AIModelUpdate(BaseModel):
    model_id: str | None = Field(None, min_length=1, max_length=200)
    display_name: str | None = Field(None, min_length=1, max_length=200)
    context_window: int | None = Field(None, ge=1)
    supports_tools: bool | None = None
    supports_streaming: bool | None = None
    is_active: bool | None = None
    config: dict[str, Any] | None = None


class AIModelResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: str
    provider_id: str
    model_id: str
    display_name: str
    context_window: int
    supports_tools: bool
    supports_streaming: bool
    is_active: bool
    config: dict[str, Any]


# ─── Presets ───

class AIPresetCreate(BaseModel):
    name: str = Field(..., min_length=1, max_length=100)
    model_id: str = Field(..., min_length=1, max_length=200)
    provider_id: str | None = None
    temperature: float = Field(default=0.7, ge=0.0, le=2.0)
    max_tokens: int = Field(default=2048, ge=1, le=128000)
    top_p: float = Field(default=1.0, ge=0.0, le=1.0)
    system_prompt: str = ""
    config: dict[str, Any] = Field(default_factory=dict)
    is_active: bool = True


class AIPresetUpdate(BaseModel):
    name: str | None = Field(None, min_length=1, max_length=100)
    model_id: str | None = Field(None, min_length=1, max_length=200)
    provider_id: str | None = None
    temperature: float | None = Field(None, ge=0.0, le=2.0)
    max_tokens: int | None = Field(None, ge=1, le=128000)
    top_p: float | None = Field(None, ge=0.0, le=1.0)
    system_prompt: str | None = None
    config: dict[str, Any] | None = None
    is_active: bool | None = None


class AIPresetResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: str
    name: str
    model_id: str
    provider_id: str | None = None
    temperature: float
    max_tokens: int
    top_p: float
    system_prompt: str
    config: dict[str, Any]
    is_active: bool


# ─── Agents ───

class AIAgentCreate(BaseModel):
    name: str = Field(..., min_length=1, max_length=100)
    description: str = ""
    system_prompt: str = ""
    preset_id: str | None = None
    tool_ids: list[str] = Field(default_factory=list)
    is_active: bool = True
    config: dict[str, Any] = Field(default_factory=dict)


class AIAgentUpdate(BaseModel):
    name: str | None = Field(None, min_length=1, max_length=100)
    description: str | None = None
    system_prompt: str | None = None
    preset_id: str | None = None
    tool_ids: list[str] | None = None
    is_active: bool | None = None
    config: dict[str, Any] | None = None


class AIAgentResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: str
    name: str
    description: str
    system_prompt: str
    preset_id: str | None = None
    tool_ids: list[str]
    is_default: bool
    is_active: bool
    config: dict[str, Any]
    created_at: datetime | None = None
    updated_at: datetime | None = None


# ─── Chat Sessions ───

class ChatSessionCreate(BaseModel):
    title: str = Field(default="Neuer Chat", max_length=255)
    agent_id: str | None = None
    is_sidebar: bool = False


class ChatSessionUpdate(BaseModel):
    title: str | None = Field(None, max_length=255)
    is_pinned: bool | None = None
    agent_id: str | None = None
    folder_id: str | None = None


class ChatSessionResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: str
    user_id: str
    agent_id: str | None = None
    title: str
    is_pinned: bool
    is_sidebar: bool
    folder_id: str | None = None
    created_at: datetime | None = None
    updated_at: datetime | None = None


# ─── Chat Messages ───

class ChatMessageResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: str
    session_id: str
    role: str
    content: str
    tool_calls: list[dict[str, Any]] | None = None
    tool_results: list[dict[str, Any]] | None = None
    tokens: int
    model_used: str
    created_at: datetime | None = None


class ChatSendRequest(BaseModel):
    content: str = Field(..., min_length=1)
    agent_id: str | None = None  # override session agent


# ─── Folders ───

class ChatFolderCreate(BaseModel):
    name: str = Field(..., min_length=1, max_length=255)
    parent_id: str | None = None


class ChatFolderUpdate(BaseModel):
    name: str | None = Field(None, min_length=1, max_length=255)
    parent_id: str | None = None


class ChatFolderResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: str
    name: str
    parent_id: str | None = None
    user_id: str
    created_at: datetime | None = None


# ─── Attachments ───

class ChatAttachmentResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: str
    message_id: str | None = None
    session_id: str
    filename: str
    mime_type: str
    size_bytes: int


# ─── Tools ───

class AIToolResponse(BaseModel):
    name: str
    description: str
    parameters: dict[str, Any]
    plugin_name: str
    required_permission: str | None = None
    category: str